Insect enemies of western forest
Keen, F. P.
Insect enemies of western forest - Washington : Government Printing Office, 1938 - 210 p. : ilus. - U.S. Dept. of Agriculture ; 273 . - U.S. Dept. of Agriculture ; 273 .
27208
Árboles--Plagas.
634.967 / K44
Insect enemies of western forest - Washington : Government Printing Office, 1938 - 210 p. : ilus. - U.S. Dept. of Agriculture ; 273 . - U.S. Dept. of Agriculture ; 273 .
27208
Árboles--Plagas.
634.967 / K44